Fiona Godlee, Editor in Chief, The BMJ, moderated the panel discussion on "Low carb high fat diets: Public controversies and opportunities" at the Swiss Re Institute's "Food for thought: The science and politics of nutrition" conference on 14 - 15 June 2018 in Rüschlikon. Panelists of this discussion: Sarah Hallberg, Medical Director and Founder, Indiana University Health Arnett Medical Weight Loss Program, Indiana University Health Michael Lean, Chair of Human Nutrition, University of Glasgow, and Consultant Physician Adjunct Professor of Human Nutrition, University of Otago, New Zealand Matthias Schulze, Professor and Head of the Department of Molecular Epidemiology, German Institute of Human Nutrition Jennie Brand-Miller, Professor of Human Nutrition, The University of Sydney Roy Taylor, Professor of Medicine and Metabolism, Director of the Newcastle Magnetic Resonance Centre, Newcastle University For more information on health and longevity: https://www.swissre.com/risk-knowledge/living-longer-healthier-lives.html